Home / 1,639.22-2,261.61-975.86

Finding the Fourth Proportional to 1,639.22, 2,261.61 and 975.86

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Solution

The fourth proportional to 1,639.22, 2,261.61 and 975.86 is: 1,346.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.22 : 2,261.61 = 975.86 : x
  2. Step 2: Convert to fraction form
    1,639.22/2,261.61 = 975.86/x
  3. Step 3: Cross multiply
    1,639.22x = 2,261.61 × 975.86
  4. Step 4: Simplify right side
    1,639.22x = 2,207,014.73
  5. Step 5: Solve for x
    x = 2,207,014.73/1,639.22
  6. Step 6: Final answer
    x = 1,346.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.